Improvement in adjustable reamers



R. M. FABURN.

Improvement in Adjustable Beamers.

N0, 128,379, Patented June 25.1872.

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PATENT OFFICE.

RUSSELL M. FABURN, or YOUNG AMERICA, ILLINOIS.

IMPROVEMENT IN ADJUSTABLE REAMERS.

Specification forming part of Letters .Patent No. 128,37 9, dated June 25,1872.

Specification describing certain Improvements in Adjustable Beamers, invented by RUSSELL M. FABURN, of Young America, county of Warren, and State of Illinois.

The naturepof my invention relates to a reamer for boring out shot-gun barrels, either with a straight bore or with a bore enlarged at any part, and contracted at either or both ends of the barrel, as desired. The invention consists in making the cutter, the backing, and the follower `adjustable to the stock, and in providing devices whereby the adjustment may be effected while the reamer is within the gun-barrel, all as hereinafter fully described.

Figure l is a side elevation of my invention. Fig. 2 is a top view. Fig. 3 is a longitudinal sectional view of Fig. 2 on the line w. Fig. 4 ,is a side view of Fig. l with the backing removed. Fig. 5 is a top view of one of the adjusting-bars; Fig. 6, a longitudinal sectional view of the wooden backing;y Fig. 7 a crosssection of Fig. l on the line y y; Fig. 8, an The drawings are all full size, except Fig. 8, which is double size. 1

A is the stock, with a threaded hole, a, at one end, into which the handle is inserted for operating the machine, and with a hole, also, at the other end, into which a screw-bolt, a', is inserted, for the purpose of holding a disk, B, in place. The end of the stock A receiving the handle is enlarged, as shown, leaving a shoulder, a", at the forward end of the en-l largement, and'the forward end carries a projection, a, having a longitudinal recess in which the knife or cutter C rests. D is an adjusting-bar for the cutter C.. It is wedgeshaped, as shown, and provided with a hook, c, at its rear end. Its forward end is passed through a hole, b, in thedisk B, and also through a hole through the rear end of the projection a, resting between the stock A and the cutter C, so that when it is pushed forward it will raise the cutter, and, when drawn out, will allow the cutter to recede. E is the follower formed in its cross-section, as shown at Fig. 7, with ledges at each side fitting snugly to the stock A, its upper side flat, with the corners e e slightly rounded oli'. G is a wedge-shaped plate, with two arms, g g,

(seeFi g. 5,) projectingforward through grooves in the sides of projection am, and having on their outer ends hooks g g. The wedge Gr passes between the follower E and the stock A, (see Figs. 3 and 7,) and may be pushed forward to elevate the follower E, or drawn back to depress the saine. H is a wooden backing formed in its cross-section, as shown at Fig. 8, and in its lower part with two inclined planes, h h, as shown at Fig. 6. I is a bar, with a hook, i, on its rear end, and two inclined-plane elevations, t" i', on its forward end, corresponding with the incline planes h h in the backing H, as shown at Fig. 3. It will be seen by the same gure that, pushing the bar I forward, the elevations i" t" will raise thek ends of the backing H simultaneously, and withdrawing or pulling it back will allow both ends to recede alike. It will be seen at Fig..8 that the bars D and I rest against the flattened sides of the head of the bolt a', and prevent its shaking loose. It will also be seen at Fig. 9, which shows the disk B alone, that it contains notches through which the adj usting-bars pass, which serve to hold it iu place. The cutter O is held in position longitudinally at one end by the upper side of the disk B, and at the other by a bridge, S. (See Fig. 2.)

The operation of my invention is as follows:

The backing, cutter, follower, and adjustingbars being all in place, the reamer may be inserted in the gun-barrel, and the operator may with a hooked rod reach the adjustingbars from the end of the barrel forward of the cutter, and either withdraw or push in either bar, as'desired, first adjusting the follower and the backing to fit snugly in the barrel, and to preserve the operating handle inthe rear, about in the center of the barrel. Then the cutter may be set to trim a light or heavy shaving, as desired, with a rotary motion of the reamer. It will be plainly seen the operation of the reamer is to cut a bore smaller at the muzzle and larger back, as desired. The follower E acts as a guide and as a burnisher.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination of the adjustable backing H, constructed substantially as described, with the adjusting-bar I fi i', stock A, and

follower E, bar G, backing H, bar I, disk B, and screw a', when combined and arranged to operate substantially as and for the purpose i set forth.

RUSSELL M. FABURN. Witnesses:

PLATT R. RICHARDs, M. H. BARRINGER. 

